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(11) | EP 1 186 478 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Circuit having bus bars and junction box containing the circuit |
| (57) An electrical circuit for use in an electrical junction box of a vehicle, has two
bus bars (15, 20) welded to each other at a weld. A first one of the bus bars is formed
of a material having an electrical conductivity selected from (a) in the range 10
to 60% and (b) not less than 60%, and the second of the two bus bars is formed of
a material having an electrical conductivity of not less than 60%. At least one of
the bus bars is tin-plated and at the weld the bus bars are joined through a tin-plating
layer. Appropriate selection of the bus bar material in view of current loads is achieved,
and good welding. |